// TProxy transparent proxy support (Linux only)

#[cfg(target_os = "linux")]
use std::net::SocketAddr;
#[cfg(target_os = "linux")]
use tokio::net::TcpListener;
#[cfg(target_os = "linux")]
use tracing::info;

#[cfg(target_os = "linux")]
pub struct TProxyServer {
    listen_addr: SocketAddr,
}

#[cfg(target_os = "linux")]
impl TProxyServer {
    pub fn new(listen_addr: SocketAddr) -> Self {
        Self { listen_addr }
    }

    pub async fn run(&self) -> anyhow::Result<()> {
        let listener = TcpListener::bind(self.listen_addr).await?;
        info!("TProxy listening on {}", self.listen_addr);

        loop {
            let (socket, addr) = listener.accept().await?;
            
            // Get original destination using SO_ORIGINAL_DST
            // This requires platform-specific socket options
            
            tokio::spawn(async move {
                // Handle transparent proxy connection
                // TODO: Implement full TProxy logic
            });
        }
    }
}

#[cfg(not(target_os = "linux"))]
pub struct TProxyServer;

#[cfg(not(target_os = "linux"))]
impl TProxyServer {
    pub fn new(_listen_addr: std::net::SocketAddr) -> Self {
        Self
    }

    pub async fn run(&self) -> anyhow::Result<()> {
        anyhow::bail!("TProxy is only supported on Linux")
    }
}
